| All Patents in class 251/263 |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 86,346 | Feb. 02, 1869 | J. Ashcroft | Safety Valve | steam safety valves |
| 453,012 | May 26, 1891 | J.F. Lonergan | Cock or faucet | faucets |
| 530,508 | Dec. 11, 1894 | H.T. Dawson | Gas Engine | gas and gasoline engines |
| 818,714 | Apr. 24, 1906 | H.J. Smith | Valve Mechanism for Gas Engines | internal combustion engine valves |
| 1,142,853 | Jun. 15, 1915 | E.F. Williams, L. Skinner | Steam Engine Valve Gear | steam engine valve gear |
| 1,678,905 | Jul. 31, 1928 | M.J. Goldberg | Pressure Relief Means | compressor relief valves |
| 2,275,624 | Mar. 10, 1942 | A.G. Hann | Control Device | flow controls |
| 2,620,823 | Dec. 09, 1952 | R.D. Wortendyke, R.R. Adams | Tracer Valve Mechanism with Dashpot | hydraulic apparatus |
| 2,903,234 | Sep. 08, 1959 | H. Steinhauer, V.v. Sundt | Timed Valve with Cam Actuator | metalworking machine mechanisms |
| 4,789,001 | Dec. 06, 1988 | L.W. Durham, B.S. Backe | Operating System for a Valve | |
